In 3011, the Professor ordered a memorial statue in their honour, and the then current crew - Fry, Bender and Leela - was set to deliver it to him. As a result, they too passed through the Tetrahedron, and they found out the true cause of the original crew's disappearance - a four-dimensional space whale. After they themselves had been devoured by the whale, the crew discovered that everything devoured by the whale was kept alive in an infinite loop. Leela managed to control the whale, and rescued both the original and the later PE crew back to Earth.